freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-case-sensitivity-in-variables.chinese.md

id, title, challengeType, videoUrl, localeTitle

id	title	challengeType	videoUrl	localeTitle
56533eb9ac21ba0edf2244ab	Understanding Case Sensitivity in Variables	1		了解变量中的大小写敏感度

Description

在JavaScript中，所有变量和函数名称都区分大小写。这意味着资本化很重要。 MYVAR与MyVar和myvar 。可以有多个具有相同名称但不同外壳的不同变量。强烈建议您为清晰起见， 不要使用此语言功能。

最佳实践

在camelCase中用 JavaScript编写变量名。在camelCase中 ，多字变量名称的第一个单词为小写，每个后续单词的首字母大写。 例子：

var someVariable;
var anotherVariableName;
var thisVariableNameIsSoLong;

Instructions

修改现有的声明和赋值，使其名称使用camelCase 。
不要创建任何新变量。

Tests

tests:
  - text: <code>studlyCapVar</code>已定义且值为<code>10</code>
    testString: 'assert(typeof studlyCapVar !== "undefined" && studlyCapVar === 10, "<code>studlyCapVar</code> is defined and has a value of <code>10</code>");'
  - text: <code>properCamelCase</code>已定义且值为<code>&quot;A String&quot;</code>
    testString: 'assert(typeof properCamelCase !== "undefined" && properCamelCase === "A String", "<code>properCamelCase</code> is defined and has a value of <code>"A String"</code>");'
  - text: <code>titleCaseOver</code>已定义，其值为<code>9000</code>
    testString: 'assert(typeof titleCaseOver !== "undefined" && titleCaseOver === 9000, "<code>titleCaseOver</code> is defined and has a value of <code>9000</code>");'
  - text: <code>studlyCapVar</code>应该在声明和赋值部分使用camelCase。
    testString: 'assert(code.match(/studlyCapVar/g).length === 2, "<code>studlyCapVar</code> should use camelCase in both declaration and assignment sections.");'
  - text: <code>properCamelCase</code>应该在声明和赋值部分使用camelCase。
    testString: 'assert(code.match(/properCamelCase/g).length === 2, "<code>properCamelCase</code> should use camelCase in both declaration and assignment sections.");'
  - text: <code>titleCaseOver</code>应该在声明和赋值部分使用camelCase。
    testString: 'assert(code.match(/titleCaseOver/g).length === 2, "<code>titleCaseOver</code> should use camelCase in both declaration and assignment sections.");'

Challenge Seed

// Declarations
var StUdLyCapVaR;
var properCamelCase;
var TitleCaseOver;

// Assignments
STUDLYCAPVAR = 10;
PRoperCAmelCAse = "A String";
tITLEcASEoVER = 9000;

Solution

// solution required